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Finding the Fourth Proportional to 9,286.80, 13,930.20 and 9,189.60

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Solution

The fourth proportional to 9,286.80, 13,930.20 and 9,189.60 is: 13,784.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,286.80 : 13,930.20 = 9,189.60 : x
  2. Step 2: Convert to fraction form
    9,286.80/13,930.20 = 9,189.60/x
  3. Step 3: Cross multiply
    9,286.80x = 13,930.20 × 9,189.60
  4. Step 4: Simplify right side
    9,286.80x = 128,012,965.92
  5. Step 5: Solve for x
    x = 128,012,965.92/9,286.80
  6. Step 6: Final answer
    x = 13,784.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.